Raws li peb txhua tus paub, kev ua yeeb yam ntawm cov duab sensor yog ib qho ntawm cov ntsiab lus uas txiav txim siab cov duab kawg zoo. Txawm li cas los xij, thaum ntsib qhov qis - lub teeb lossis siab}}}} cov suab nrov piv thiab muaj ntau yam kev sib tw feem ntau ntsib. Txhawm rau kom daws tau cov teeb meem no, 'pixel bining' thev naus laus zis tau qhia thiab tau dhau los ua cov duab txhim kho kom zoo.
Pixel bining yog cov koob yees duab PIZERATE ntau zaus tau hais nyob hauv thaj teb smartphone, tab sis tam sim no tseem siv nyob rau hauv lub teb ntawm lub zeem muag thiab lub zeem muag. Kab lus no yuav yog koj cov lus qhia tshaj lij hauv thaj teb cov qauv thiab yuav tshawb xyuas qhov tob hauv thaj chaw pixel binned nyob rau hauv lub teb chaws ntawm embedded lub zeem muag.
Yuav ua li cas pixels ua lub luag haujlwm nyob rau hauv lub zeem muag thiab koob yees duab?
Ua ntej nkag siab txog lub tswvyim ntawm Pixel Binning, cia thawj zaug saib ntawm dab tsi pixels yog. Pixels yog cov qauv tseem ceeb tshaj plaws ntawm cov duab digital. Sab hauv daim duab sensor, txhua pixel yog cov ntawv me me uas tsuas yog hloov dua li cas cov ntaub ntawv hluav taws xob. Tus naj npawb ntawm cov kev them nqi no sib haum rau kev siv lub teeb tau txais los ntawm pixel, sib sau cov ntaub ntawv ci ci ntawm daim duab. Micrometers (ib lab ntawm lub me me ntawm lub meter) tau siv los ntsuas qhov loj ntawm cov pixels, thiab pixels me dua ib micrometer suav tias yog me me.
Thaum lub teeb hits rau lub teeb nto, txhua pixels ua haujlwm hauv sync, txhua tus ntes cov ntaub ntawv teeb ntawm thaj chaw. Cov paib them no yog tom qab ntawd khawb thiab ua ke rau hauv cov duab digital peb pom. Tus naj npawb ntawm pixels txiav txim siab qhov kev daws teeb meem spatial thiab nthuav dav ntawm daim duab, thaum lub cev loj ntawm cov pixel uas cuam tshuam rau nws lub teeb rhiab thiab muaj suab nrov nrov. Cov Pixels loj tuaj yeem sau ntau lub teeb tshaj me dua pixels. Txawm li cas los xij, cov pixels me me pab ntes cov khoom me me thiab cov ntsiab lus.
Dab tsi yog Pixel Binning?
Pixel Binning, tseem hu ua sensor binning lossis sensor pixel binning, yog cov ntaub ntawv sau ua tshuab ua rau cov duab sensors. Lub hauv paus ntsiab lus yog kho tau ntau yam uas nyob ib sab ntawm lub sensor (xws li 2x2, 3x3, thiab lwm yam) los ua ib qho loj dua "Super Pixel" lossis "hluavtaws pixel".
Nyob rau hauv txoj kev no, txawm hais tias kev daws teeb meem ntawm cov duab sib xyaw ua ke yog txo qis, lub teeb liab lub zog muaj nyob rau hauv txhua ntu hluav taws xob pixel tau nce. Cov tub ntxhais ntawm pixel binning yog kom txi cov ntsiab lus hauv kev sib pauv duab thiab phiajcim - suab sib piv (SNR). Qhov no tso cai rau lub koob yees duab kom tau txais cov duab ntshiab txawm tias muaj kev mob siab rau cov kev ua tsis zoo ntawm cov koob yees duab hauv cov xim tsaus. Nws yog qhov tshwj xeeb rau cov scenes uas yuav tsum tau cov duab purity tshaj cov kev daws teeb meem.
Pixel Binning Ua Haujlwm Li Cas?
Nws muaj ob txoj hauv kev los siv Pixel Binning: analog binning thiab digital binning, uas ua cov ntaub ntawv sau ua ke ntawm cov ceg txheem sib txawv ntawm cov teeb liab saw hlau.
Analog Binning tshwm sim ua ntej lub cim teeb liab tau hloov los ntawm lub cim hluav taws xob, uas yog, ua ntej} hack 1} Digital Converter (ADC). Lub sensor kho vajtse ncaj qha tsub cov nqi ntawm cov pixels nyob ib sab ntawm tus nqi. Qhov zoo dua ntawm hom qauv no yog vim li cas los ntawm Bining tau ua tiav ua ntej cov suab nrov yog tsim tawm, cov lus qhia ntawm lub teeb liab {}- suab sib piv. Piv txwv li, 2x2 analog binning tuaj yeem nqa 4 zaug lub teeb liab nce, thaum lub suab nrov nyeem tsuas yog nce me ntsis. Qhov no yog qhov ntsuas pom tau muaj txiaj ntsig zoo tshaj plaws thiab feem ntau siv nyob rau hauv cov koob yees duab kev ua haujlwm nrog cov xim nruj yuav tsum tau kom tsawg {{\\ lub teeb kev ua haujlwm.
Cov paib binning tom qab lub cim analog ntawm lub pixel tau hloov mus rau lub cim digital los ntawm ADC. At this time, the digital values of adjacent pixels are summed or averaged in the image processing unit (ISP) or the back-end processor. Qhov zoo dua ntawm txoj kev no yog tias nws yoog tau yooj yim siv tau los siv thiab tuaj yeem muab teeb tsa thiab tswj tau ntawm cov software. Txawm li cas los xij, txij li lub suab nrov hauv txhua tus pixel tau qhia thaum lub cim digitization yog feem ntau tsis yog qhov tseem ceeb li ntawm analog binning, tab sis nws tseem tuaj yeem txhim kho kev txhim kho tag nrho cov rhiab.
Txawm hais tias cov txheej txheem twg, tom qab lub pixel binning pinning, qhov siab ntawm cov qauv qub), tab sis qhov kev ua kom zoo nkauj, tab sis qhov kev ua yeeb yam ntawm daim duab yuav ua rau zoo dua.
Dab tsi yog qhov zoo ntawm cov duab lossis pixel bearning?
Dab tsi yog qhov zoo ntawm cov duab lossis pixel bearning? Pixel Bining Tas Ntau cov txiaj ntsig tseem ceeb rau lub zeem muag kos duab, ua rau nws tsis muaj cov ntaub ntawv thov tshwj xeeb:
- Txhim kho qis - lub teeb kev ua haujlwm thiab rhiab:Qhov no yog qhov ua tau zoo ntawm pixel bearning. Nyob rau hauv ib puag ncig nrog lub teeb tsis txaus, tus naj npawb ntawm photons ntes los ntawm ib qho pixel tau txwv los ntawm ib qho teeb meem tsis muaj zog, ua rau muaj kev tiv thaiv tsis muaj zog thiab kev cuam tshuam tsis muaj kev cuam tshuam. Dhau los ntawm kev sib koom ua ke, cov duab ntawm ntau lub pixels tau ua lub suab nrov zoo thiab muaj kev nce qib kom muaj zog thiab siv tau cov duab tsaus nti thiab siv tau txawm tias tsis muaj ib puag ncig tsaus nti.
- Txhim kho lub teeb liab - rau - suab nrov sib piv (SNR):Los ntawm kev tsim cov cim los ntawm ntau lub pixels thiab ua rau muaj kev cuam tshuam zoo ntawm kev nyeem ntawv nrov, sensor pixel banning tuaj yeem txhim kho lub teeb liab - suab nrov piv ntawm cov duab. Raws li tsab ntawv tshaj tawm los ntawm kev lag luam tswj hwm kev lag luam techtarget, lub teeb liab {}}}} Cov suab nrov tuaj yeem hloov kho tau los ntawm 4 zaug los ntawm pixel sib koom ua ke. Qhov no txhais tau tias qhov piv txwv ntawm cov ntaub ntawv siv tau zoo (teeb liab) rau cov ntaub ntawv tsis zoo (suab nrov) hauv cov duab siab dua, ua rau cov duab purer thiab tsis tshua ntxhov siab.
- Txhim kho tus ncej tus lej thiab cov ntaub ntawv ua tau zoo:Thaum yuav tsum daws teeb meem tsis yog li huab cua, cov nyiaj yuav raug txo los ntawm kev txo cov duab daws tau zoo. Qhov no ncaj qha txo cov ntaub ntawv kis cov ntaub ntawv thiab cov ntaub ntawv ua cov khoom ntim ntawm lub nraub qaum (xws li ISP, CPU lossis FPGA), yog li ua tiav cov duab tus lej siab dua. Qhov no yog tus nqi zoo rau cov ntawv thov uas yuav tsum tau ntes cov kab ntau lawm, thaum tseem txo cov hluav taws xob kev siv hluav taws xob thiab kev ua tau zoo.
- Nthuav cov khoom siv thiab cov duab qhia ntxaws ntxaws:Los ntawm kev sib xyaw ua ke pixels, tag nrho {- muaj peev xwm ntawm txhua "Super Pixel" tuaj yeem nce. Qhov no txhais tau tias ib qho hluavtaws pixel tuaj yeem tsub ntau ntxiv yam tsis muaj kev daws teeb meem loj dua, yog li muab cov duab loj tshaj plaws ntawm cov duab thiab cov duab kom dav ntawm cov duab. Piv txwv li, omnivision taw tes nyob rau hauv nws cov ntaub ntawv kev sib xyaw ua ke uas pixel kev sib xyaw yog ib qho ntawm cov txhais tau tias zoo los txhim kho cov khoom siv tsis zoo ntawm lub sensor.
Cov kev daws teeb meem ua ke no ua rau pixel bining rau kev tshuaj xyuas kev ruaj ntseg, thiab kos duab tsaus nti uas xav tau cov kev xav tau siab dua tab sis muaj tsawg dua kev daws teeb meem. Nws muab cov kab ke tsim qauv nrog cov cuab yeej siv tau yooj yim kom sib npaug ntawm kev daws teeb meem, rhiab, thiab tus lej.
Cov kev txwv thiab kev txiav txim siab txiav txim siab ntawm Pixel Binning
Txawm hais tias qhov zoo ntawm pixel binning thev naus laus zis yog qhov tseem ceeb, nws kuj muaj qee qhov kev txwv. Embedded lub zeem muag engineers yuav tsum tau ua tib zoo ua lag luam- tawm ntawm cov ntawv thov tswv yim:
Qhov mob tseem ceeb yog qhov ncaj ncaj ntawm kev daws teeb meem. Lub lag luam pixel binning ncaj qha txo qhov txiaj ntsig zoo ntawm cov duab, ua rau cov duab ploj. Yog li ntawd, rau cov ntawv thov cov kev xaiv uas muaj cov ntaub ntawv nthuav dav heev, yog li kev ntsuas cov ntsiab lus zoo tshaj plaws, yog li cuam tshuam rau kev ntsuas kev ntsuas zaum kawg lossis kev lees paub.
In addition, as mentioned earlier, the improvement effect of digital binning on the signal-to-noise ratio is usually not as significant as analog binning because the noise has been introduced at the digitization stage. Yog li ntawd, thaum xaiv lub koob yees duab uas haum rau muaj kev nkag siab tob ntawm nws cov kev ua kom zoo pixel raws li cov qauv digital), uas yuav cuam tshuam ncaj qha rau cov duab tshiab zoo thiab ua haujlwm.
Hauv qhov kev xa tawm tiag tiag, tsim kev kuaj xyuas cov duab ua kom zoo, thiab ua tib zoo siv cov ntawv thov kom ua tiav, yog li yuav tsum tau txiav txim siab siv cov ntaub ntawv zoo kawg nkaus, yog li yuav tsum tau txiav txim siab siv cov ntaub ntawv zoo kawg nkaus, yog li yuav tsum tau siv cov ntaub ntawv zoo kawg nkaus, yog li yuav tsum tau txiav txim siab siv cov ntaub ntawv zoo kawg nkaus, yog li kom ua tiav cov ntaub ntawv ua kom tiav, yog li yuav tsum tau txiav txim siab siv cov ntaub ntawv zoo kawg nkaus, thiab ua kom zoo rau cov duab zoo tshaj plaws thiab cov txheej txheem ua haujlwm sib npaug.
Lub ntsiab
Pixel Binning, raws li lub zog muaj zog thiab siv tau cov duab kho kom zoo dua qub, ua lub luag haujlwm tseem ceeb hauv thaj chaw thiabLub Koob Yees Duab Modules.Nws ua tiav kev sib pauv tseem ceeb txhim kho thiab teeb liab {{} {{1} {}}}} Cov duab ceev ceev, thiab cov muaj txhij txhua.
Nws yog qhov tseem ceeb rau txhua tus kws ua yeeb yam koom nrog hauv thaj chaw ua lub zeem muag kom muaj kev nkag siab tob txog cov ntsiab lus sab hauv ntawm dab tsi yog pixel binning? thiabYuav ua li cas pixel binning ua haujlwm? Los ntawm kev siv sensor binning thev naus laus zis tsim nyog thiab ntse, koj yuav muaj peev xwm ua tau zoo nkauj thiab txhim khu kev qha ib puag ncig thiab ua tiav cov duab ua zoo.
Tshej pab koj txhim kho qhov zoo ntawm cov duab kos duab zoo
Puas yog koj lub zeem muag pom kev pom kev cov nyom loj ntawm qis {{0} - ceev ceev? Xav kom muaj qhov tseem ceeb ua kom pom zoo lub koob yees duab kev ua haujlwm los ntawm Pixel Bining Technology? Raws li cov kws tshaj lij ntawm cov kws tshaj lij kev lag luam hauv lub koob yees duab hauv lub koob yees duab, suav nrog kev xaiv customized kev sib xyaw thiab kev siv tshuab ua haujlwm raws li cov thev naus laus zis pixel pinnen pinnel pining thev naus laus zis.Tiv Tauj Peb Tam Sim NoRau hauv {- qhov kev sab laj qhov tob tob thiab cia peb tshawb xyuas kom paub tseeb tias koj tuaj yeem ntes cov duab ntshiab thiab ntse thiab cov duab ntshiab!
